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Barrett's esophagus is a condition that occurs when the tissue lining the esophagus, the muscular tube that connects the mouth to the stomach, changes and becomes similar to the tissue that lines the intestine. This can happen as a result of chronic acid reflux, a condition in which stomach acid flows back into the esophagus and irritates the lining. People with Barrett's esophagus are at an increased risk of developing esophageal cancer, but the condition itself does not typically cause any noticeable symptoms. In some cases, individuals with Barrett's esophagus may experience symptoms similar to those of acid reflux, such as heartburn, difficulty swallowing, chest pain, upper abdominal pain, nausea or vomiting, and unintentional weight loss. Barrett's esophagus is diagnosed through an endoscopy, a procedure in which a flexible tube with a camera is inserted into the esophagus to examine the tissue. If the tissue appears abnormal, a biopsy may be taken to test for cancerous or precancerous cells. Treatment for Barrett's esophagus aims to prevent the development of cancer and may involve medications to reduce acid reflux, lifestyle changes such as weight loss and avoiding trigger foods, and in some cases, surgery or endoscopic treatments to remove or destroy abnormal tissue. If you have a history of acid reflux or GERD, it is important to seek medical attention if you experience any persistent or unusual symptoms. Early detection and treatment of Barrett's esophagus can help reduce the risk of developing esophageal cancer.